(of a person, institution, or written work) The quality or characteristic of being respected for having good character or knowledge, especially as a source of guidance or an exemplar of proper conduct.

Right or permission authorized verbally rather than in writing.

An organisation charged by the governing body of a country or region with the provision of postal services within that region.

(aviation) The degree of control that the elevators can exert over the pitching motion of an aircraft; related to elevator design and airspeed.

(aviation) The degree of control that the ailerons can exert over the rolling motion of an aircraft; related to aileron design and airspeed.

(aviation) The degree of control that the rudder can exert over the yawing motion of an aircraft; related to rudder design and airspeed.

(computing) Software that can combine text with other multimedia to make an integrated package.

(computing) An organization that issues digital certificates for use by other parties.

plural of authority figure

In local government, a single-tier authority which replaces a two-tier structure. For example, in England, county councils are abolished and their responsibilities are transferred to boroughs and local government districts (but this only applies to some counties, not all). In some cases complete counties, such as Cornwall and Northumberland, are now unitary authorities without any subdivision into local government districts.